//: io/Worm.java
// Demonstrates object serialization.
package io;

import java.io.*;
import java.util.*;
import static net.mindview.util.Print.*;

class Data implements Serializable
{
    private int n;
    
    public Data(int n)
    {
        this.n = n;
    }
    
    public String toString()
    {
        return Integer.toString(n);
    }
}

public class Worm implements Serializable
{
    private static Random rand = new Random(47);
    
    private Data[] d = {new Data(rand.nextInt(10)), new Data(rand.nextInt(10)), new Data(rand.nextInt(10))};
    
    private Worm next;
    
    private char c;
    
    // Value of i == number of segments
    public Worm(int i, char x)
    {
        print("Worm constructor: " + i);
        c = x;
        if (--i > 0)
            next = new Worm(i, (char)(x + 1));
    }
    
    public Worm()
    {
        print("Default constructor");
    }
    
    public String toString()
    {
        StringBuilder result = new StringBuilder(":");
        result.append(c);
        result.append("(");
        for (Data dat : d)
            result.append(dat);
        result.append(")");
        if (next != null)
            result.append(next);
        return result.toString();
    }
    
    public static void main(String[] args)
        throws ClassNotFoundException, IOException
    {
        Worm w = new Worm(6, 'a');
        print("w = " + w);
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("worm.out"));
        out.writeObject("Worm storage\n");
        out.writeObject(w);
        out.close(); // Also flushes output
        ObjectInputStream in = new ObjectInputStream(new FileInputStream("worm.out"));
        String s = (String)in.readObject();
        Worm w2 = (Worm)in.readObject();
        print(s + "w2 = " + w2);
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        ObjectOutputStream out2 = new ObjectOutputStream(bout);
        out2.writeObject("Worm storage\n");
        out2.writeObject(w);
        out2.flush();
        ObjectInputStream in2 = new ObjectInputStream(new ByteArrayInputStream(bout.toByteArray()));
        s = (String)in2.readObject();
        Worm w3 = (Worm)in2.readObject();
        print(s + "w3 = " + w3);
    }
} /*
   * Output: Worm constructor: 6 Worm constructor: 5 Worm constructor: 4 Worm constructor: 3 Worm constructor: 2 Worm
   * constructor: 1 w = :a(853):b(119):c(802):d(788):e(199):f(881) Worm storage w2 =
   * :a(853):b(119):c(802):d(788):e(199):f(881) Worm storage w3 = :a(853):b(119):c(802):d(788):e(199):f(881)
   */// :~
